• 한국안전학회지
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• 제31권5호
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• pp.74-81
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• 2016

This paper presents an experimental study to ivestigate mechanical property of concretes according to addition of urea and urea-water soluble sulfur contents. Urea was added at 5~20% replacement by weight of water, and water soluble sulfur was used at 2%, 4% replacement by weight of cement. The setting times, the hydration heat, the compressive strength, and the drying shrinkage, were measured on concretes with single and binary admixtures. From the test result, it was confirmed that the hydration heat of urea-water soluble sulfur was lower than that of normal concrete by $10.1^{\circ}C$, and the drying shrinkage of urea-water soluble sulfur concrete was more excellent than normal concrete. In the case of urea of 5%, Compressive strength were improved with an increase of water soluble sulfur contents. The urea-water soluble sulfur used in this research can be used as improvement materials for drying shrinkage and compressive strength.

• 한국환경보건학회지
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• 제14권2호
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• pp.29-41
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• 1988

This study was performed to investigate the air pollution levels in Daegu area titrough measuring of contents of water, chlorophyll, water soluble sulfur and lead metal in the leaves of roadside trees and chemical properties of soil under the urban trees. The results can be summarized as follows 1. The range of water content was from 60.4% to 74.6%. The comparisons of chlorophyll, water soluble sulfur and water content were regression equation, chlorophyll=0.1981+ 0.0040 water content (July), water soluble sulfur=3,139-0.0416 water content (July). and correlation coefficient, r=0.561 and r=0.549 respectively 2. Average contents of chlorophyll, water soluble sulfur and lead metal in the leaves of roadside tree at sampling sites were chlorophyll 0.050, 0.072mg/cm$^2$, water soluble sulfur 0.244, 0.333%, and lead metal 12.25, 12.68ppm in Oct. and Jul. respectively. 3. Correlation between chlorophyll and contents of water soluble sulfur and lead metal in the leaves of roadside tree at sampling sites were water soluble sulfur r=-0.564, -0.613 and lead metal r=-0.693, -0.699 in October and July, respectively. 4. Correlation between chlorophyll and water content, water soluble sulfur and lead metal in the leaves of tree showed positive significance.

• 한국안전학회지
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• 제29권4호
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• pp.103-109
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• 2014

In this study, two types of water-soluble sulfur, LSA and LSB, were developed and the influence of the water-soluble sulfur on the mechanical properties and durability of concrete were experimentally evaluated. In order to evaluate mechanical properties and carbonation resistance of concrete with water-soluble sulfur, compressive strength test, flexural strength test, bonding strength test, and carbonation resistance test were performed. Compressive strength of only concrete with 1% LSA was increased while that of concrete with LSB was proportionally increased with the higher LSB dosage. On the other hand, flexural strength of concrete with LSA and LSB was increased by 12-41% and 36-74%, respectively. Carbonation resistance of concrete with water-soluble sulfur were increased by 25-66%. As a result, it should be noted that the water-soluble sulfur can not only solve the demerit of sulfur concrete but also offer the durability of sulfur concrete.

• 한국환경보건학회지
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• 제17권1호
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• pp.1-12
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• 1991

The atmospheric SO$_{2}$ concentrations and water soluble sulfur contents in Ginkgo biloba were measured and analyzed in auto-measuring station, Kwangleung, and Yongmun from August 5 to October 21, 1990. The results of the study are as follows: 1. Atmospheric SO$_{2}$ concentrations between the seoul area(Pulkwang, Ssangmun, Myonmok, Oilurn) in which the concentrations exceeded the air quality standards and the surburb of seoul (Kwangleung, Yongmun) revealed the significant difference (p<0.01). 2. Water soluble sulfur contents in Ginkgo biloba in autumn were higher than those in Ginkgo biloba in summer (p<0.01). Water soluble sulfur contents in leaves showed a significant difference between seoul and its surburb(p<0.01). 3. Correlation between atmospheric SO$_{2}$ concentration and water soluble sulfur content of Ginkgo biloba in autumn was as follow Y=0.2714+9.8123 X, r=0.6362 (X: Airborne SO${_2}$ Concentration according to sampling location, Y: Water Soluble Sulfur Contents)

• 한국대기환경학회지
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• 제4권1호
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• pp.1-12
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• 1988

This study was carried out to measure the contents of soluble sulfur and heavy metals in the leaves of roadside tree at 34 sampling sites of Seoul area from the Sep. 1 to Sep. 30 during 1985 and 1986. The results were as follows; 1. Average contents of soluble sulfur at all sampling sites were; Plantanus orientalis 0.474%, Ginkgobioloba 0.562%, and Salix pseudolasiogyne 0.566%. 2. Correlation between sulfur dioxide concentration in the air and soluble sulfur in the leaves by area were; Green belt area R = 0.985, Residential area R = 0.856, Commercial area R = 0.668, Industrial area R = 0.886. Correlation by species were ; Platanus orientalis R = 0.817, Ginkgobiloba R = 0.771, Salix pseudo-lasiogyne R = 0.824. 3. Correlation between $SO_X$ concentration in the air and sulfur contents in the leaves showed positive significance. 4. Contents of soluble sulfur in the heavy traffic area were higher than that of light traffic area. 5. Heavy metal contents of 1986 were higher than that of 1985; Fe> Mn > Zn > Pb > Cu > Cd > Cr. 6. Lead contents in the leaves of 1986 were; Platanus orientalis 16, 701 ppm, Gingobiloba 21,729ppm, Salix Pseudo-lasiogyne 12.418 ppm.

• 한국환경농학회지
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• 제14권2호
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• pp.144-154
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• 1995

울산지역내 23개의 배나무 조사구를 선정하여 조사장소의 재배환경과 배나무잎의 수용성 황 함량, 광합성 속도 및 가시피해도지수를 측정, 분석하여 울산지역의 대기오염 평가를 시도할 결과는 다음과 같다. 1. 배나무잎의 평균 수용성 황 함량은 0.201%였으며, 오염지역 조사구는 $0.220{\sim}0.496%$로 높았다. 또한 오염배출원을 중심으로 거리가 멀어짐에 따라 수용성 황 함량은 감소되었다. 2. 배나무의 광합성 속도는 수용성 황 함량이 축적됨에 따라 감소되었고, 오염배출원을 중심으로 반경 5km까지는 거리가 멀어짐에 따라 광합성 속도가 증가되었다. 3. 1993년 배나무의 가시피해도를 산정한 결과 오염배출원으로부터 5km 이내에서는 60% 이상의 피해율을 나타냈으며, 피해도지수 각 항목간에는 고도의 정의 상관이 인정되었다. 또한 1988년과 비교해 보면, 1988년에는 여천동과 야음동을 중심으로 피해율이 높았으나 1993년에는 용잠동과 부곡동을 중심으로 피해의 중심지가 이동하였다. 4. 수용성 황 함량과 피해도지수, 수용성 황 함량과 광합성속도 간에는 고도의 상관이 인정되어 배나무를 이용한 대기중 $SO_2$평가에 활용될 수 있는 가능성을 보였다.

• 한국농림기상학회지
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• 제4권4호
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• pp.219-223
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• 2002

우리나라의 가로수 중 왕벚나무와 쥐똥나무를 공시하여 SO$_2$의 처리농도를 달리했을 때 각 수준에 의한 수피산도, 엽중산도 및 엽내 수용성 황 함량의 변화를 측정하여 SO$_2$가 수목에 미치는 영향을 분석한 결과는 다음과 같다. 왕벚나무와 쥐똥나무의 각 농도별 수피산도는 전체적으로 SO$_2$의 농도가 높아질수록 pH는 낮아지는 경향을 보였으며, SO$_2$ 농도별 처리에 따른 수피산도 증가율 변화에 있어서는 왕벚나무가 큰 폭의 증가율을 보였고, 4.0 ppm의 농도로 처리하였을 때 쥐똥나무에 비해 수피산도에 대한 상대적 감수성이 큰 것으로 사료된다. 농도별 엽중산도는 수피산도와 마찬가지로 전체적으로 SO$_2$의 농도가 높아질수록 엽중산도는 높아지는 경향을 보였으며, 대조구의 경우 공시목의 엽내 수용성황 함량 분석결과는 쥐똥나무(0.0105%)가 왕벚나무(0.0056%)보다 높게 나타났으며, 공시목 2개 수종 모두 SO$_2$ 가스 농도가 높아짐에 따라 엽내 수용성 황 함량이 증가하였다.

• 한국대기환경학회지
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• 제1권1호
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• pp.25-32
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• 1985

To examine the effects of air pollution on Pinus thunbergii growing around Yocheon Industrial Complex, evaluation of visible injury based on Injury Index and chemical analysis of water-soluble sulfur and fluorine contents in needles were carried out on 30 sampling sites. Histological responses of needles were also investigated on the necrotic needle tissues. Not only Injury Index but water-soluble sulfur and fluorine contents were higher at all sites than those at control site, and showed significant correlationship among them. Especially, they were rather higher in the vicinity of air pollutants sources. Water-soluble sulfur contents were positively correlated with average atomospheric $SO_3$ concentrations. Microscopic examination of necrotic needle tissues showed that mesophyll cells were collapsed with hypertrophy and collapse of transfusion cells.

• The Korean Journal of Ecology
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• 제16권1호
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• pp.27-37
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• 1993

During the autumn of 1991, the water soluble sulfur content in litters of platanus orientalis on the street sides in seoul, pusan, taegu, taejeon, kwangji, ulsan and ch'unch'on cities were determined. The relationship between the water soluble s content in litters of p. orientalis and the traffic was analysed. The average content of water soluble s in litters of p. orientalis in pusan, taegu, taejeon, seoul, ulsan, ch'unch'on and kwangju cities were 0.71%, 0.60%, 0.66%, 0.58%, 0.50%, 0.43%, 0.38%, respectively. The correlation was not statistically significant between the s content in litters of p. orientalis is related to the traffic of each studied area. consequently the water soluble s content in litters of p. orientalis is supposed to be an indirect indicator of air pollution.

• 한국산림과학회지
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• 제81권2호
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• pp.117-123
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• 1992

본(本) 연구(硏究)는 전주(全州)-군산간(群山間) 국도변(國道邊) 약(約) 40Km에 열식(列植)된 왕벚나무를 대상으로 하여 자동차 배기가스에 의한 공기오염(空氣汚染)이 왕벚나무의 생육(生育)에 미치는 영향(影響)을 규명(糾明)하고자, 선정(選定)된 전주(全州)-군산간(群山間) 국도변양측(國道邊兩側)에 10개의 지점(地點)에서 각(各) 지점(地點) 당 5그루씩 총(總) 100주(株)에 있어서 수관중간부위(樹冠中間部位)에서 성숙엽(成熟葉)을 채취(採取)하여 엽중(葉中) 수용성(水容性) 황(黃), Pb, 그리고 Cd 함유량(含有量)을 조사(調査)하였다. 주요결과는 다음과 같다. (1) 엽중수용성(葉中水溶性) 황(黃) 함유량(含有量)은 0.06-0.07%의 범위를 보였고, 대조구보다 2배(倍)가 더 많았다. 전주(全州)-이리간(裡里間)보다는 이리(裡里)-군산간(群山間)의 시료(試料)가 더 높은 수용성(水容性) 황(黃) 함유량(含有量)을 보였다. 대조시료(對照試料)와 비교할 때 황(黃)의 오염(汚染)이 인정되었다. (2) Pb 함유량(含有量)은 12-35ppm의 범위를 보였고 도로우측시료(道路右側試料)의 함유량(含有量)이 좌측시료(左側試料) 함유량(含有量)보다 높았다. 대조시료(對照試料)와 비교할 때 Pb의 더 많은 흡수량(吸收量)을 인정할 수 있었다. Pb 오염원(汚染源)은 일단 차량의 배기(排氣)가스에서 오는 것으로 추단(推斷)하고 이곳을 스쳐가는 바람의 영향도 생각 될 수 있는 것으로 보았다. (3) Cd 함유량(含有量)은 0.42-0.98ppm의 범위를 보였고 대조시료(對照試料)와 비교할 때 Cd의 오염(汚染)이 인정 될 수 있었다. (4) 벚나무 도로수(道路樹)의 건강도(健康度)는 주로 교통에 의한 오염이외(汚染以外)에도 개체(個體)에 따fms 유전적(遺傳的) 차이(差異), 그리고 국소입지(局所立地)의 차등(差等), 제인자(諸因子)의 혼합작용(混合作用)이 생각될 수 있을 것이다.